Protoxide
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That one of a series of oxides having the lowest proportion ofoxygen. See Proto-, 2 (b). protoxide of nitrogen, laughing gas, nowcalled hyponitrous oxideNO. See under Laughing.
Protoxide meaning & definition 1 of Protoxide.
That one of a series of oxides having the lowest proportion ofoxygen. See Proto-, 2 (b). protoxide of nitrogen, laughing gas, nowcalled hyponitrous oxideNO. See under Laughing.
